WWE.Com have posted the cause of death for Eddie Guerrero, and it appears that his heart failure was brought on by his past alcohol and drug abuse.

Basically, Guerrero's blood vessels were so heavily damaged after his past addictions, they caused his heart to work too hard, up until the point where his body just couldn't take it anymore.

News courtesy of WWE.Com:

"After the untimely passing of Eddie Guerrero, WWE and the entire sports-entertainment community is still reeling from the devastating loss of a champion. The initial autopsy reports on Guerrero have come in. WWE.com spoke with Eddie’s widow, Vickie Guerrero, earlier today.

“It was heart failure. It was from his past – the drinking and the drug abuse. They found signs of heart disease. She (the examiner) said that the blood vessels were very worn and narrow, and that just showed all the abuse from the scheduling of work and his past. And Eddie just worked out like crazy all the time. It made his heart grow bigger and work harder and the vessels were getting smaller, and that’s what caused the heart failure. He went into a deep sleep.

As soon as they saw his heart, they saw the lining of his heart already had the heart disease. There was no trauma, and Eddie hadn’t hurt himself in any way. It answered a lot of questions. I knew Eddie wasn’t feeling very good for the last week. He was home and kept saying he wasn’t feeling good and we thought it was just “road tired.” So we thought he just had to rest. It answered a lot of my questions, too, because he was just so exhausted. She said it was normal because the heart was working so hard."